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1. c. SHARP.

CAN. APPLICATION FILED SEPT-8.19M- BENEWED AUG. 9. I919.

Patented 001. 14,1919.

UNITED STATES PATENT OFFICE- LEE G. SHARP, 0F PLATTSMOUTH, NEBRASKA, ASSIGNOR T0 AMERICAN CAN COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

CAN.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application filed September 8, 1917, Serial No. 190,296. Renewed August 9-, 1919. Serial No. 316,490.

and other food products although it will.

be manifest that the invention has other and wider application.

provision of a can having in efl'ect a seamless body having edges of uniform thickness.

In cans constructed for the. pu rpose of packing food prior to my invention it has been generally the custom to overlap the interlocking. edges. in forming a side seam with the result that there is a double thickness of metal at. the body ends and where the heads or can ends are secured in place. \Vhere leakage has occurred in cans thus constructed it has .Q'enerally been at the ends of the side seam and by reason of the excess thickness of metal there located. This invention has fora purpose the elimination of this extra thickness through the provision of a body, seamless in effect, presenting a continuous edge of even thickness for the receiving of the head or can end.

A further object of the invention is the provision of a can .which may be more cheaply constructed in that itwill require less material to construct the body and will not require solder in the formation of the side seam.

A still further object of the invention is the rovision of a can which will permit the hem s or closures to be seamed tr the body by a. more even action of the seam rolls.

Other objects and advantages of the invention will be apparent as it is better understood from the following description when consideredin connection with the accompanying drawing ill ustrat i ng-a preferred embodiment thereof.

On the drawing,

Figure 1 is a perspective view of a can body with one end crimped thereto and embodying my invention;

Fig. 2 is a section through the sheet iron body sheet;

A principal object of the invention is the Fig. 3 shows the same after tinningand Fig." 4 is a. perspective view of a can with the head double seamed in position.

This invention contemplates the provision of a can having a welded side seam brought to substantially the thickness of the stock of the body. In making'the can the black metal or iron body sheet 9 is bent to tubular form and the side edges Welded in a smooth Weld, as indicated at 10 in Figs. 2 and 3 of the drawing. This is coated internally and eX-, ternally with tinas indicated at 11 so that in the finished tubular body the seam is completely hardened and the edges 12 are continuous and unbroken and of even uniform thickness about the entire periphery. The edge 12 is flanged to receive a double seamed cover 13, shown in Fig. 4, which is united in place by a double seam 14. In Fig. l the lower edge 15 has crimped to it a bottom closure in the crimped seam 16. In both forms of seams it will be observed no edges overlap in the seam and since the leaks in the closed cans have chiefly occurred at the overlapping edges in the seams the percentage of leaks is very much less Where cans embodying my invention are used. Indeed with suitable machinery leaks should be sub stantially eliminated.

It is thou ht that the invention and many of its atten ant advantages Will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages,

said edges being united continuously edge to edge in a. hermetic seam comprising only one thickness of metal, and a can end seamed thereto in a double seam which contains a uniform thickness-0f the body metal at all points of the seam, whereby said seam has no irregularities or leaks.

2. A new article of manufacture, consisting of a can body constructed of a sheet of metal bent to bring its side edges in contact, said edgesbeingt united continuously edge to edge in a hermetic seam comprising only one uniform thickness of metal, the ends of said body being formed With seaming flanges of said uniform thickness, and a can end seamed thereto in a double seam which contains a uniform thickness of the body metal at all points of the seam, whereby sald seam has no irregularities or leaks.

3. A new article of manufacture, consisting of a can body constructed of a sheet of metal bent to bring its side edges in contact, said edges being hermetically welded continuously edge to edge in ,a hermetic seam comprising only one uniform thickness of metal, the ends of said body being formed with seaming flanges of said uniform thickness, and a can end seamed thereto in a double seam Which contains a uniform thickness of the body metal at all points of the seam, whereby said seam has no irregularities or leaks.

4. A new article of manufacture, consisting of a can body constructed of a sheet of metal bent to bring its side edges in contact, said edges being hermetically united continuously edge to edge in a hermetic seam comprising only one uniform thickness of metal, the ends of said body being formed with seaming flanges of said uniform thickness, and a can end seamed thereto in a double seam which contains a uniform thickness of the body metal at all points of the seam, whereby said seam has no irregularities or leaks, said body and end having external and internal protective coatings.

Signed in the presence of tWO subscribing witnesses.

LEE C. SHARP. AWitnesses:

G. R. OLSON W. L. GILMORE. 

